Sony Koinion VTC5A 2-pack box.:- Reliable 35A High Drain 18650 Battery. The ultimate battery for high drain devices, the Sony VTC5A Battery has both world class power and performance for heavy duty electronics. The VTC5A comes packed with reliable Nickel Manganese Cobalt chemistry that is incredibly stable even at high drain rates, allowing it to be discharged at up to 35A! This high drain power is ideal for demanding electronics. The battery is capable of holding 2500mAh capacity for extra long run times, making the Sony VTC5A the premiere battery for high-drain devices.